// Package catalogpublicationv2store owns the strict v2 durable Catalog
// publication row shape and its immutable exact insert/read path.
//
// The package recognizes only two fixed table identities: the future canonical
// live table and one halted-migration shadow table. Callers cannot supply a
// table name. Every operation requires an opaque handle returned only after the
// complete table shape has been verified. The shadow can be created explicitly
// by an offline operator; this package is not wired into normal startup and
// never migrates, decodes, or falls back to v1 state.
package catalogpublicationv2store